The definition of RR_CurrentScanoutPixmap was removed from randr.h so reference to it must be removed from rrcrtc.c in line 1512 plus probably line 1513 must go as well.
There's a patch pending to fix this which is awaiting review.
From: Keith Packard <firstname.lastname@example.org>
Cc: Keith Packard <email@example.com>
Subject: [PATCH] randr: Add 'set' fields to SetCrtcConfigs request
Date: Wed, 16 Feb 2011 22:59:22 -0800
RandR 1.4 has been reverted for X server 1.10